I did an experiment with 3d mark vantage a while back where I had my video card, HD 5870 @ 1000/1375, and ran a test with 6 cores, 4 cores and 2 cores. 6 and 4 did not make much of a difference in graphics score but 4 and 2 had a noticeable difference. Let me look for it.

Ooops I deleted the Photobucket pics already. But here is the link, if you read it proves not a huge difference at all in cores on cpu when it comes to, well at least 3d mark vantage, scores with graphics.

I would say get that X2 555, and who knows, might be able to unlock a core or 2. But if not oh well, dont really need it.

EDIT: I have that exact chip in your sig in my GF rig and it runs GTAIV very nicely with a 8800GTS 512, but you can probably OC an X2 555 to around or at 4.0 ghz making it much faster.Edited by Chuckclc - 6/1/11 at 9:16am

The 955 can be had for 119.00 113.99 these days, and on sale at the egg for less than a hundred. Watch the [online deals] thread daily to find a steal. I would go with the x4, especially if you are going to be playing BfBC2 as it loves a quad.